Slewing Bearing Ring Circle Parts fit Sumitomo Excavators
High-performance slewing bearing tailored for Sumitomo SH series excavators such as SH120, SH200, SH240, and SH330. Manufactured from forged 42CrMo alloy steel with hardened raceways and CNC-machined internal gear teeth, this swing ring ensures stable upper rotation and long-term resistance to load deformation—especially under repetitive digging and swing cycles.
| Material | 50Mn/42CrMo |
|---|---|
| Surface Hardness | HRC58-62 |
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Kinton Parts is trusted by professionals worldwide for delivering high-quality parts for excavators, bulldozers, and other construction machinery—with guaranteed performance and durability.
In Sumitomo excavators, the slewing bearing connects the rotating upper body to the stationary lower structure, allowing precise 360-degree movement during excavation, loading, and dumping.
Models like SH200 or SH330 operate in high-load environments where the swing mechanism must:
- Support vertical loads from the boom and bucket
- Transfer horizontal force during offset digging
- Withstand torque during repeated swing acceleration and braking
A well-manufactured slewing ring ensures smooth rotation without backlash, helping maintain operator control, machine balance, and structural integrity under pressure.
Slewing Bearing Production Process
Our slewing bearings are built through a multi-stage process that ensures both strength and precision.
Product Features & Technical Details
- Material: 42CrMo forged alloy
- Gear Type: Internal gear with hardened tooth flanks
- Heat Treatment: Raceways & gear teeth hardened to HRC 50–60
- Seal Options: Multi-lip rubber seals to keep debris and water out
- Grease Ports: Compatible with OEM lubrication systems
- Rotation Testing: Fully tested under torque and motion loads before shipment
Forged Ring Pre-Machining
Our process begins with high-quality alloy steel rings (typically 42CrMo), forged and polished for flatness and crack-free integrity. These rings form the structural base of both inner and outer components.
Gear Cutting on Inner Ring
Using high-precision CNC gear cutters, we machine internal teeth on the inner ring. Tooth profiles are optimized to match Sumitomo’s swing motor pinion and then induction hardened to resist shear and wear.
Final Packing & Storage
Each finished bearing is grease-sealed, rust-protected, and wrapped in plastic, then carefully packed into custom wooden crates for export. Labels include model, part number, and QC codes for traceability.
Model Compatibility – Sumitomo SH Series
We have slewing bearings that can match the following models.
| BRAND | MACHINERY MODEL NUMBER | |||||||
|---|---|---|---|---|---|---|---|---|
| SUMITOMO | SH60 | SH75 | SH100 | SH120 | SH120-3 | SH120-5 | SH130 | SH135 |
| SH200 | SH200-1 | SH200-2 | SH200-3 | SH200-5 | SH200-7 | SH210 | SH210-5 | |
| SH210-6 | SH210-7 | SH220 | SH240 | SH260 | SH265 | SH280 | SH300 | |
| SH330 | SH350 | SH370 | SH400 | SH430 | SH450 | SH480 | SH490 | |
Need help verifying fitment? Send us your casting code, machine serial number, or bearing drawing, and we’ll confirm compatibility within 12 hours.
Quality Inspection & Standards
Every bearing passes through a 5-stage QC process:
- Ultrasonic flaw detection on forged rings
- Raceway hardness testing & dimension check
- Gear backlash and profile conformity check
- Simulated full-load rotation test for smooth motion
- Final surface inspection & packing check
All bearings meet or exceed OEM-grade tolerance and wear standards.
Export Packaging & Logistics
To ensure safe delivery worldwide:
- Bearings are oil-coated and film-wrapped
- Packed in durable export wooden crates
- Cartons are labeled with product info for easy warehouse management
- OEM-customized or neutral branding available upon request
- We support LCL and FCL shipping with full documentation for customs clearance.
Frequently Asked Questions (FAQ)
Q: What if I don’t know the part number?
A: No problem. Just send us the machine model, photo of the old bearing, or basic dimensions (OD, ID, height), and we’ll match it.
Q: Is there a minimum order quantity?
A: No minimum. We support orders from 1 unit up to full containers.
Q: How long does it take to deliver?
A: Most Kubota slewing bearings are in stock. We can ship within 7 days, depending on your location and quantity.
SHIPPING & DELIVERY
At Kinton Parts, we ensure reliable, worldwide shipping of parts for excavators, bulldozers, and a full range of construction machines—safe, fast, and secure.
All products are securely packed using high-quality export cartons, reinforced wooden cases, or industry-standard palletized packaging to ensure maximum protection during transit and smooth handling during unloading.
Standard orders are typically shipped within 3–5 working days, while large or customized orders are usually dispatched within 7–20 days, depending on volume and production requirements.
We offer flexible global shipping options, including:
- International sea freight for cost-effective bulk transport
- Air freight for urgent orders
- Courier delivery (DHL, FedEx, UPS) for small-volume or sample shipments
Our logistics team manages every shipment carefully, providing real-time updates and tracking information until your order arrives safely at your destination.
Need assistance choosing the best shipping method for your location and timeline? Contact our team — we’ll help you plan a smooth delivery experience.
FAQ
Q: What are your main products?
A: We supply a full range of undercarriage and wear parts for excavators, bulldozers, and other heavy equipment. Our product line includes: Track rollers, carrier rollers, front idlers, sprockets, segments, track shoes, track chains, bolt and nuts, pins and bushings, bucket teeth and adaptors, filters, seal kits, swing bearing, and hydraulic cylinder—plus other essential replacement parts.
Q: Which countries do you export to?
A: Kinton Parts exports to over 60 countries worldwide, including:
USA, Canada, UK, Germany, Russia, UAE, Indonesia, Malaysia, Thailand, India, Pakistan, Bangladesh, Sri Lanka, South Africa, Colombia, Peru, and many others.
Q: Can I order a sample?
A: Yes, we accept trial orders. For parts in stock, samples can be shipped quickly. If you have technical drawings or existing samples, we also support customized production and mold development.
Q: How can I track my order after shipping?
A: Once your order is shipped, we will provide you with all necessary tracking information based on the shipping method. For express deliveries, you’ll receive a tracking number to follow the shipment online. For air or sea freight, we’ll send you the relevant documents such as the airway bill (AWB) or bill of lading (B/L), along with the packing list and commercial invoice to help with tracking and customs clearance.
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Trusted by professionals worldwide, Kinton Parts supplies premium-quality components for excavators, bulldozers, and more—with reliable quality you can count on.
